This card is symbolic of the jolt of actual understanding. Lightning, feared by the primitive is the opposite of an enlightened one, using its power for his own uses. So with this, we can look at the card and understand that the man and woman, conscious and subconscious are knocked from the top of the tower by the light of true knowledge or understanding.
The crown is symbolic of the mind or the place of power and thought. The card represents a blow to the ego / disillusionment / ruin / chaos / changes / disruptions.
In a reading, the presence of the card may be indicative of failures or ruin. It may also be indicative of changing of the scheme that is not conforming to reality. The card asks the querent to be more cautious and to think out of the box. The querent must revisit his / her thought process. The card also speaks of the fact that anything based on wrong foundation is bound to get destroyed.